A.range of the tide
B.plane of the tide
C.stand of the tide
D.reversing of the tide
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A.tide is falling from high water to low water
B.tide is rising from low water to high water
C.tide is reaching to a highest level
D.tide is reaching to a lowest level
A.depth of water at a specific time due to tidal effect
B.difference between the depth of the water and the area's tidal datum
C.difference between the depth of the water and the high water tidal level
D.difference between the depth of the water at high tide and the depth of the water at low tide
A. the angle between the horizontal and the line of sight to the visible horizon
B. index error
C. parallax
D. terrestrial refraction
A.Mean low water
B.Mean high water
C.Average water level
D.Geographical sea level
A.the time of day
B.the seasons
C.geography
D.All of the above
最新試題
Attention is called to the fact that in many cases charted depths may be decreased by up to （）.
Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.
A vessel is entering port A for the first time and has a Pilot conning the vessel. The Master is unsure that the Pilot is taking sufficient action to prevent a collision. What should the Master do（）.
The distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the（）.
A vessel not to impede the passage of another vessel is not relieved （） taking collision-avoiding action.
During a period of whiteout，you should expect which of the following（）.
For full information regarding the current circulation of the Indian Ocean,（） Sailing Direction,Current Atlas,etc.
The Earth has the shape of a(n) （）.
At last，the palm trees that fringe the natural harbor of Port Aloahoa come into view on the horizon lit by the setting sun.The meaning of this sentence is that （）.
The height of eye correction is smaller than geometrical dip because of （）.